| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 45°F | 33°F | 4.5" |
| February | 26°F | 47°F | 35°F | 4.8" |
| March | 38°F | 60°F | 47°F | 6.6" |
| April | 47°F | 70°F | 57°F | 9.3" |
| May | 55°F | 77°F | 65°F | 8.8" |
| June | 65°F | 86°F | 74°F | 9.9" |
| July | 68°F | 89°F | 78°F | 9.6" |
| August | 66°F | 88°F | 76°F | 10.9" |
| September | 58°F | 80°F | 68°F | 8.0" |
| October | 47°F | 69°F | 57°F | 7.5" |
| November | 38°F | 59°F | 47°F | 6.5" |
| December | 28°F | 46°F | 36°F | 3.6" |
| Index | Hermitage | Missouri | National |
| Air quality index | 39 | 97 | 42 |
| Pollution index | 559,454 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 322 |
| Days with moderate air quality | 43 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Urbana, MO | 442 | 39 | 22.0% |
| Weaubleau, MO | 633 | 39 | 22.0% |
| Humansville, MO | 1,391 | 39 | 22.0% |
| Gerster, MO | 20 | 39 | 22.0% |
| Climax Springs, MO | 215 | 39 | 22.0% |
| Hermitage, MO | 778 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Oak Creek, CO | 778 | 47 | 6.0% |
| Dover, ID | 778 | 43 | 14.0% |
| Oneida, IL | 778 | 46 | 8.0% |
| Wataga, IL | 778 | 41 | 18.0% |
| Laurel, IN | 778 | 6 | 88.0% |
| Hermitage, MO | 778 | 39 | 22.0% |
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